MX Record Checker
MX records define which mail servers receive email for your domain.
Result for sina.com.cn
Found
| Priority | Exchange |
|---|---|
| 10 | freemx2.sinamail.sina.com.cn. |
| 10 | freemx3.sinamail.sina.com.cn. |
| 10 | freemx1.sinamail.sina.com.cn. |
FAQ
What are MX records?
They define which servers receive inbound email for a domain and their priority order.
Do I need MX records?
Only if you want to receive email on this domain. Sending can work without MX depending on provider.
Why is Exchange shown as “.”?
Some configurations use a null MX (RFC 7505) to explicitly disable email receiving.
Should I have multiple MX servers?
Usually yes for redundancy, unless your provider explicitly uses one.
How long does DNS change take?
Propagation depends on TTL and caching; typically minutes to hours.
Common mistakes
- MX points to a hostname without an A/AAAA record.
- Using CNAME for MX target (not recommended).
- Wrong priorities or only one server without redundancy.